andrew_k wrote:
A SHORT m6. I used a too-long bolt, it bottomed out and I torqued the head of it straight off, and it was a grade 10 bolt.
How the hell did you do that?

What do you mean 'torqued the head off' ? Did you try and do the bolt up tight or something?

I usually just put a long bolt in a few turns by hand, literally less than fingur tight. I dont even screw it in all the way, just a few threads to engage the pin.
It needs to be a long-ish M6 so that there is something protruding from the gearbox that you can grab onto. Then I use pliers to pull/leveridge the bolt out of the hole, which pulls the pin. I then un-wind the bolt by hand (because it wasnt even fingur tight) and chuck the sacrificial M6 in the bin because i would have scarred it up while grabbing it with the pliers.
Quote:
The solution was to drill out the m6 bolt, install an m8 helicoil and bolt, and pull it all out carefully. Fortunately it was a parts car so I cut the radiator support and pulled out the engine and gearbox as one, then did the drilling. Don't stuff up clutch fork pins, you'll have a bad time.